Red Lion MDC - Manual (Page 24)

PROGRAM ALARMS MENU
Alarm parameters 1 and 2 activate solid state Alarm Outputs 1
and 2 respectively. A manual reset, which requires the use of a
User Input, will reset an Alarm Output (see Program User Menu).
Both alarms may be programmed for any of the five alarm
functions: High Alarm, Low Alarm, Deviation Alarm, Zero
Speed Alarm, and Disabled. The following flowchart shows only
the Alarms portion:
ALARM TYPES
High Alarm (HIGH ALM)
The alarm output activates when the feedback input registers a
speed greater than or equal to the alarm value in display units.
Low Alarm (LOW ALM)
The alarm output activates when the feedback input registers
a speed less than or equal to the alarm value in display units. The
alarm may be active or inactive in stop mode (see Stop Enabled
or Disabled).
Deviation Alarm (DEV ALM)
The alarm output activates when the feedback input registers a
speed outside of a ± band around the current speed or ratio
setpoint. The band is equal to the ± alarm value in display speed
units. The alarm may be active or inactive in stop mode (see Stop
Enabled or Disabled).
For Example: A speed setpoint of 1000, with an alarm setpoint
of 10 would activate the alarm when the speed fell below 990 or
went above 1010.
Zero Speed Alarm (ZERO SPD)
The alarm output activates when the feedback input receives no
input pulse for at least 1 second. There is no alarm value
associated with the Zero Speed Alarm.
Disabled
The alarm output is inactive when disabled.
-22-